Casing-elevator.



S. A. GUIBERSON, J11. CASING ELEVATOR.

APPLIGATION FILED 1120.23, 1912.

11,073,750. Patented Sept. 23, 1913.

WITNESSES. 7 INVENTUR j/ggk? amaal Z/n. fll zflwdnjr,

A TTORNEV SAMUEL ALLEN GUIBERSON, JR" OF COALIliTGA, CALIFORNIA.

CASING-ELEVATOR.

Specifiea tion of Letters Patent.

t "alentcd.E-tcptif'tL W13.

Application filed December 28 1912 Serial No. 738.184.

To 1 'uf/iou/ if may concern Be it known that; t, Smrnnn .tuinx Gunannsox, Jr., a citizen of the United States, residing); at (loalinga, in the county of Freanoand titate of California. have invented certain new and useful ,improvenrents in Casing-Elevators. of which the following is a specification. v

My invention relates to that class of wellcasing elevators in which opposing jaw- IHQIl'lbGIS adapted to embrace the casing-pipe under its coupling collar are provided at their free ends with an autonratic locking means.

The object of my invention is to provide a casing-elevator of this type, the tree ends of whose jawonemloers are titted with a simple and attentive automatic iat -h and are formed with interengaging ahutmcnts or bearinge adapted for stress l't'i'ittllit't? without undue dependence upon aaid latch.

To this end my invention consists in the novel casingelevator which shall now fully describe hy relt'ercnee to the accompanying drawings, in \vhich--- Figure 1 is a, plan ot my casing-rlevator, showing it locked. Fig. in a front clovation of the same. Fig. 3 is a section on the line ar or of Fig. "L.

'l is one jai'v-meml'ier of the elevator and 2 is the other jaw-i'nemher. These together form the complete enihrncement for the easing pipe, whether they are Hynnnetricaliy conlpleinental. as here shown, or one is of greater are than the other. These members are hinged together at some point in their joint eircun it'erenee whether? at or near their suspension lugs 3. or as h ere shown on a line lmidway between F-flltl lugs.

One of the member-n, here shown aa that designated by t, has at its free end a projecting llange 5, the inner .l ace oil which it? formed with a hearing lag projecting l'rom it about midway ol its vertical dimension said lug heinp; heat l'ormcd tapering as seen in Fig. 2. In the lug t is made horizontally a socket; 7 in which is ecatwt the latch 8 the beveled head ol whi h in held normally projected from the. inner face of the lug, by a spring 10.

ll is a handle the shank ll o'l" which in seenr'ed to the latch 8, staid handle providing, the "i'neans for n'ianually retracting toe latcli.

The other inemhcnQ oi. the elevator has a flange 13 which projects from its l'rec end, and in said flange at its outer end, mid

way ol' its vrrt ai dimcunioin is made a not h l-t, the hr rl wall lfi of which is how clcd. The notch t which is tapered to c riwtpoud to the tapered lug ti is lzozhioned in wilt lo tit over the said lug t3 ot the flange of the oppoaine jaw H'ltlliltt'l 1 so that the lu will accurately enter and seat iteelt' in the notch regardless o'l any play in the hinge connection of the jaw ll'iclnlnl's. .It will now he seen that when the tree code of the two jaws are hrought together, the beveled head wall 15 of the notch 11- acting upon the beveled head El ol' the rctracl'ahlc latch 8 will for e said latch outwardly from the path olinoreincnh and when the llange l3 ia lu'ought home agaiud the opposing llang'o 5, the latch H will, under its spring): 10. more inward again to a locking posilitm hehind and against the outer face ol' lhc llange l3. The two jairom-inlnn's are .uu.- locked tog 'cthcr, and in this position their ahutmcnls or hearings are lirsl', the latch on one side and the inner face: ol the two flang s 13 and Ti on the other side to loch against mvinn'inp; movement alioul the hinge line 4', and, second. lhc upper and lcncr 'alls ot' the notch H agaiu t the upper and lower surfaces, resperlively, ol' the lug (i to lock the parts against \crticat movement. Thus a complete inlcrlitting is provided, locking the parts against movement in any direction and the locking in autou'iatic. In the direction of egreatcet sirens in the use of the clevator namely vertical, whe lifting the casing section from the ground and lower ihg it into the well. the strain in not imposed upon th latch. Sllt'li stress lining liornc hy the intcirngagiug lug t3 and notch l t. To unlock the elevator the latch in retracted by pulling out on the handle ll, whereupon the jawnncmhers 1, and 2 may' he swung Open.

T. claim l. in a caFing-elevator the (Ollll)ltltlii()l) of opposing jawnncurhcrn hingg'ed together at one end, the free end oli one oi said members having; an outwardly extending flange, the inner face of which intermediate its upper and lower edges is provided with a projecting lug. said ling; having a tit'ltcl made in it parallel with its end face. and the free end ot the other mcmhcr having an outwardly (titlltliirif flange formed with a notch in itn outer end adaplcd to lit above and helow the lug' oi thc first nu-inher flange; and a retraetahle spring;- controlled latch mounted in 

